Check out my answer here. The question is on backing up your SD card, but the process is identical, see the bit on restoring the image. Alternatively, this wiki may help.
– Alex CoplanDec 28 '12 at 15:06

1

You can use the open source graphical app Etcher to do this, and it works on Mac, Windows and Linux.
– Brad ParksJun 18 '17 at 1:01

It's not that difficult, and the actual copying is only one command, the rest is to make sure you will be writing to the correct device. And the first chapter states: The RPi-sd card builder utility is a app which will walk you through the process of installing to SD card. That sounds like a nice application that with a couple if clicks does what you want... The link for this app is in the document.
– ikkuDec 27 '12 at 17:43

1

Can't get that to work. :(
– user4039Dec 27 '12 at 17:51

Oh, and the application keeps crashing.
– user4039Dec 27 '12 at 17:51

Then I guess you need to switch to option 2, Mostly GUI
– ikkuDec 27 '12 at 17:54

In this case I can verify /dev/disk3 is my SD card because the TYPE, NAME and SIZE values are correct.

If you have an existing partition on the disk you may need to unmount it, otherwise you'll get a "Resource busy" error message when you try to write the image.

diskutil unmount /dev/disk3s1

Now to write the image file to the disk. Note the 'r' added to rdisk3 which drastically improves write performance by telling dd to operate in raw disk mode:

sudo dd if=RetroPieImage_ver2.3.img of=/dev/rdisk3 bs=1m

Depending on the size of your SDcard this may take a while. You can press CTRL+T to see the current status of dd. As an example for my Samsung 8GB SD card the write speed was 12MB/s the command took 11mins to complete.

DO NOT TRY THIS!!!! It freezes, then if you cancel, you get stuck with some partitions on the card that literally refuse to be deleted. Disk Utility has greyed out all of my format/erase options.
– boulder_rubyJan 1 '15 at 19:39

@boulder_ruby: some users seem to have authentication issues with v1.6 due to authentication requirements by OS X. Your problem however is completely new to me. Did you cancel of "Force Quit" (maybe this caused "dd" to go weird in the background)?
– HanzaplastiqueJan 2 '15 at 9:12

Can you add some more detail in your answer? Linking things Is not as helpful as explaining it...
– KachamenusNov 8 '15 at 18:35

I would do but then again I would be copying and pasting everything from the website onto here. It outlines steps from downloading package and transferring the .img file onto SD Card. Its as detail as it gets.
– Karbon62Nov 9 '15 at 21:28

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